Pinjaroen, Sutham, Oermporn Krisanapan, Vachiraporn Benjawang, and Karanrat Soonthornpan. 1998. “Factors influencing on the refusal of puerperal tubal sterilization”. Thai Journal of Obstetrics and Gynaecology 10 (3). Bangkok, Thailand:167-72. https://he02.tci-thaijo.org/index.php/tjog/article/view/257062.